package com.itheima.reggie.controller;


import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.AliOss;
import com.itheima.reggie.utils.AliyunOssUtils;
import lombok.extern.slf4j.Slf4j;
import org.apache.tomcat.util.http.fileupload.IOUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.UUID;


//文件上传和下载
@RestController
@RequestMapping("/common")
@Slf4j
public class CommonController {

    @Value("${reggie.path}")
    private String basePath;

    @Autowired
    AliyunOssUtils aliyunOssUtils;

    //文件上传方法
    @PostMapping("/upload")
    public R<String> upload(MultipartFile file) throws IOException {
        //file时临时文件，需要转存到指定位置，否则本次请求完成后 临时文件会删除
        log.info(file.toString());

        //原始文件名
        String originalFilename = file.getOriginalFilename();
        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));
        //使用UUID重新生成文件名，防止文件名重复造成文件覆盖
        String fileName = UUID.randomUUID().toString() + suffix;

        //创建一个目录对象
        File dir = new File(basePath);
        if (!dir.exists()){
            //如果目录不存在  new一个
            dir.mkdirs();
        }

        try {
            //将临时文件转存到指定位置
            file.transferTo(new File(basePath + fileName));
        } catch (IOException e) {
            e.printStackTrace();
        }

        aliyunOssUtils.uplocaFile(fileName,file.getInputStream());

        return R.success(fileName);
    }

    //文件下载
    @GetMapping("/download")
    public void download(String name, HttpServletResponse response) throws IOException {

//        try {
//            //创建输入流  通过输入流来读取文件
//            FileInputStream fileInputStream = new FileInputStream(new File(basePath + name));
//
//            //创建输出流  通过输出流来进行文件写回浏览器
//            ServletOutputStream outputStream = response.getOutputStream();
//
//            response.setContentType("image/jpeg");
//
//            int len = 0;
//            byte[] bytes = new byte[1024];
//            while ((len = fileInputStream.read(bytes)) != 1) {
//                outputStream.write(bytes, 0, len);
//                outputStream.flush();
//            }
//
//            //关闭资源
//            outputStream.close();
//            fileInputStream.close();
//        } catch (IOException e) {
//            e.printStackTrace();
//        }
        aliyunOssUtils.downLoadFile(name,response.getOutputStream());

        //IOUtils.copy(new FileInputStream(new File(basePath+name)),response.getOutputStream());

    }
}
